EP0146185A3 - Telephone circuit comprising a class-b amplifier - Google Patents

Telephone circuit comprising a class-b amplifier Download PDF

Info

Publication number
EP0146185A3
EP0146185A3 EP84201810A EP84201810A EP0146185A3 EP 0146185 A3 EP0146185 A3 EP 0146185A3 EP 84201810 A EP84201810 A EP 84201810A EP 84201810 A EP84201810 A EP 84201810A EP 0146185 A3 EP0146185 A3 EP 0146185A3
Authority
EP
European Patent Office
Prior art keywords
amplifier
class
telephone circuit
telephone
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84201810A
Other versions
EP0146185B1 (en
EP0146185A2 (en
Inventor
Peter Johannes Maria Sijbers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of EP0146185A2 publication Critical patent/EP0146185A2/en
Publication of EP0146185A3 publication Critical patent/EP0146185A3/en
Application granted granted Critical
Publication of EP0146185B1 publication Critical patent/EP0146185B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
EP84201810A 1983-12-15 1984-12-05 Telephone circuit comprising a class-b amplifier Expired EP0146185B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8304312A NL8304312A (en) 1983-12-15 1983-12-15 TELEPHONE CIRCUIT WITH CLASS-B AMPLIFIER.
NL8304312 1983-12-15

Publications (3)

Publication Number Publication Date
EP0146185A2 EP0146185A2 (en) 1985-06-26
EP0146185A3 true EP0146185A3 (en) 1985-07-24
EP0146185B1 EP0146185B1 (en) 1988-03-30

Family

ID=19842875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201810A Expired EP0146185B1 (en) 1983-12-15 1984-12-05 Telephone circuit comprising a class-b amplifier

Country Status (6)

Country Link
US (1) US4649235A (en)
EP (1) EP0146185B1 (en)
JP (1) JPH0777398B2 (en)
CA (1) CA1219982A (en)
DE (1) DE3470267D1 (en)
NL (1) NL8304312A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686757B1 (en) * 1992-01-29 1997-03-28 Sgs Thomson Microelectronics CURRENT MODULATOR OF A TELEPHONE LINE.
US5229721A (en) * 1992-04-06 1993-07-20 Plantronics, Inc. Micropower amplifier/transducer driver with signal expansion
US6975172B2 (en) * 2004-05-03 2005-12-13 Peavey Electronics Corporation Smart voltage rail reduction audio amplifier
JP5881547B2 (en) * 2012-07-05 2016-03-09 能美防災株式会社 Fire alarm system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745261A (en) * 1971-09-20 1973-07-10 Bell Telephone Labor Inc Telephone set speech network
CA982714A (en) * 1974-07-12 1976-01-27 Tapio H. Murto Audible signalling means for a telephone
FR2441301A1 (en) * 1978-11-08 1980-06-06 Int Standard Electric Corp BIDIRECTIONAL AMPLIFIER FOR SUBSCRIBER TELEPHONE

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2013829B2 (en) * 1970-03-23 1972-04-20 Licentia Patent Verwaltungs GmbH, 6000 Frankfurt PACKAGING B-AMPLIFIER WITH TRANSISTORS
JPS5838965B2 (en) * 1974-10-31 1983-08-26 ソニー株式会社 Zoufuku Cairo
JPS4941236B2 (en) * 1971-08-28 1974-11-07
GB1406663A (en) * 1972-08-22 1975-09-17 Standard Telephones Cables Ltd Telphone subset circuits
US3936614A (en) * 1974-09-16 1976-02-03 Stromberg-Carlson Corporation PBX ground start trunk interface for station carrier systems
GB1537484A (en) * 1976-01-27 1978-12-29 Rca Corp Transistor amplifier with over-current prevention circuitry
JPS51113402A (en) * 1975-03-28 1976-10-06 Iwatsu Electric Co Ltd Receiving amplification circuit for telephone
JPS5753113A (en) * 1980-09-17 1982-03-30 Pioneer Electronic Corp Push-pull amplifier
US4446443A (en) * 1981-02-09 1984-05-01 Zenith Radio Corporation Amplifier having reduced power dissipation and improved slew rate
US4536888A (en) * 1981-08-21 1985-08-20 Plantronics, Inc. Voice communication instrument system with line-powered receiver conditioning circuit
JPS58212249A (en) * 1982-06-03 1983-12-09 Fujitsu Ltd Solid-state telephone set circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745261A (en) * 1971-09-20 1973-07-10 Bell Telephone Labor Inc Telephone set speech network
CA982714A (en) * 1974-07-12 1976-01-27 Tapio H. Murto Audible signalling means for a telephone
FR2441301A1 (en) * 1978-11-08 1980-06-06 Int Standard Electric Corp BIDIRECTIONAL AMPLIFIER FOR SUBSCRIBER TELEPHONE

Also Published As

Publication number Publication date
EP0146185B1 (en) 1988-03-30
DE3470267D1 (en) 1988-05-05
JPS60142655A (en) 1985-07-27
JPH0777398B2 (en) 1995-08-16
NL8304312A (en) 1985-07-01
CA1219982A (en) 1987-03-31
US4649235A (en) 1987-03-10
EP0146185A2 (en) 1985-06-26

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